Created
October 1, 2023 05:32
-
-
Save kevinlinxc/692b3bfa50bfd59a9a0232409b9b2923 to your computer and use it in GitHub Desktop.
Pygeodesy Testing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # pip install pygeodesy | |
| import pygeodesy.sphericalNvector | |
| def intersection_point(lat_long_1, bearing_1, lat_long_2, bearing_2): | |
| vector1 = pygeodesy.sphericalNvector.LatLon(*lat_long_1) | |
| vector2 = pygeodesy.sphericalNvector.LatLon(*lat_long_2) | |
| return vector1.intersection(bearing_1, vector2, bearing_2) | |
| # tests that make sense for intersection_point() | |
| def test_north_pole(): | |
| # any two gps locations with bearing 0 should intersect at north pole, latitude 90. | |
| gps_1 = (52.520, 13.405) # berlin | |
| gps_2 = (49.246, -123.116) # vancouver | |
| gps_3 = (31.224, 121.469) # shanghai | |
| bearing = 0 | |
| int1 = intersection_point(gps_1, bearing, gps_2, bearing) | |
| int2 = intersection_point(gps_1, bearing, gps_3, bearing) | |
| int3 = intersection_point(gps_2, bearing, gps_3, bearing) | |
| print(int1, int2, int3) | |
| assert int1.lat == 90.0 | |
| assert int2.lat == 90.0 | |
| assert int3.lat == 90.0 | |
| print( | |
| f"longitude: {int1.lon, int2.lon, int3.lon}" | |
| ) # long of north pole is 0 for this library | |
| def test_small_field(): | |
| # tests some points on thunderbird field. Most similar to our use case. | |
| # https://imgur.com/a/KcbBFlJ | |
| # Fix B, choose A1 and A2 and record bearing for each and see if A1, A2, bearings give back B or close | |
| B = (49.25475, -123.24557) | |
| A1 = (49.25433, -123.24585) | |
| A1_bearing = 23.52 | |
| A2 = (49.25437, -123.24548) | |
| A2_bearing = 351.21 | |
| inter = intersection_point(A1, A1_bearing, A2, A2_bearing) | |
| print(f"Actual: {B}") | |
| print(f"Predicted: {inter}") | |
| print(f"Lat difference: {inter.lat - B[0]}") | |
| print(f"Long difference: {inter.lon - B[1]}") | |
| def test_country(): | |
| B = (43.86622, -99.9699) | |
| A1 = (41.5085800, -115.5716600) | |
| A1_bearing = 78.38 | |
| A2 = (39.57182, -94.92699) | |
| A2_bearing = 318.78 | |
| inter = intersection_point(A1, A1_bearing, A2, A2_bearing) | |
| print(f"Actual: {B}") | |
| print(f"Predicted: {inter}") | |
| # demonstrates that this method is not very accurate for long distances, which is fine because | |
| # we are only flying over a small field. | |
| if __name__ == "__main__": | |
| # test_north_pole() | |
| # test_small_field() | |
| test_country() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment